Profile: Hoosier Spring Co., Inc. specializes in heat treatment and inspection of precision springs. We offer torsion springs, clock springs and custom wire forms. Our spring ranges from .008" to .750". We offer springs in cylindrical, conical, barrel, hourglass, variable rate and magazine. We also offer springs in body types and hooks. Our spring used for aerospace applications which include engine controls, deicing controls, hydraulic controls, fuel filtering systems, navigational guidance systems, aircraft wheels and brakes.